Low-Cost Portable Reader for Frequency Domain Chipless Tags: Architecture and Experimental Results on Depolarizing Tags

Chipless Rfid Tags

a compact multi resonator circuit for Chipless rfid tag is presented in this paper. The basic resonator is a shorted λ/4 Stepped Impedance Resonator (SIR). The tag is designed and simulated using High Frequency Structure Simulator and a 6 bit prototype is fabricated on rtduroid(εr=2.2 and tanδ=.0008) Substrate in area of 4.5x2cm2. Data is coded as amplitude variations in the frequency domain. H...

Time-domain Measurement of Time-coded Uwb Chipless Rfid Tags

Chipless ultra-wideband (UWB) has been proposed as a low-cost alternative for radiofrequency identification (RFID). In this paper, a comprehensible theoretical introduction to time-domain operation of a UWB RFID tag is described, and a circuit model is proposed. For commercial applications low-cost RFID readers are demanded. To this end, this paper addresses the measurement of time-coded UWB ch...

Minimalist Cryptography for Low-Cost RFID Tags

A radio-frequency identification (RFID) tag is a small, inexpensive microchip that emits an identifier in response to a query from a nearby reader. The price of these tags promises to drop to the range of $0.05 per unit in the next several years, offering a viable and powerful replacement for barcodes. The challenge in providing security for low-cost RFID tags is that they are computationally w...

Frequency of diabetes mellitus in patients with skin tags

Background and aim: Diabetes mellitus is a metabolic disease with multiple complications. Skin tag is a pedunculated papule, which is more common in women and has been suggested as a cutaneous marker of diabetes mellitus. The aim of this study was to determine the frequency of diabetes mellitus in patients with skin tags.Materials and methods: This descriptive study was...

Fully Printed Chipless RFID Tags towards Item-Level Tracking Applications